Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}

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	Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}
	H. M. Zhang; P. R. Liu; F. Li; H. W. Liu; Y. Wang; S. Q. Zhang; M. X. Guo; H. M. Cheng; H. J. Zhao
	2011
发表期刊	Chemistry-a European Journal
ISSN	0947-6539
卷号	17 期号:21 页码:5949-5957
摘要	Anatase TiO(2) microspheres with controlled surface morphologies and exposed crystal facets were directly synthesized on metal titanium foil substrates by means of a facile, one-pot hydrothermal method without use of any templating reagent. The obtained products were characterized using Xray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelecron spectroscopy (XPS), and the focused ion beam (FIB) technique. The sizes of the resultant microspheres ranged from 1.1 to 2.1 mu m. The transformation of anatase TiO(2) microspheres with exposed {001} facets surface to nanosheets surface with {101} facets was achieved by simply controlling the hydrothermal reaction time. The anatase TiO(2) microspheres with exposed square-shaped plane {001} facets were obtained by controlling the reaction time at 1 h. The prolonged reaction time transforms the anatase TiO(2) microspheres with exposed square-shaped plane {001} facets to eroded {001} facets then to a nanosheet surface with exposed {101} facets. With hydrothermal synthesis, the surface morphological structure and crystal facets formation are highly dependent on dissolution/deposition processes, which can be strongly influenced by attributes, such as pH of the reaction media, the total concentration of dissolved and suspended titanium species, and the concentration of fluoride in the reaction solution. The changes of these attributes during the hydrothermal process were therefore measured and used to illustrate the morphology and crystal-facet transformation processes of anatase TiO(2) microspheres. The surface morphologies and crystal-facet transformations during hydrothermal processes were found to be governed by the compositional changes of the reaction media, driven by dynamically shifted dissolution/ deposition equilibria. The photocatalytic activities of the photoanodes made of anatase TiO(2) microspheres were evaluated. The experimental results demonstrated that the photocatalytic activity of anatase TiO(2) microspheres with exposed {001} facets was found to be 1.5 times higher than that of the anatase TiO(2) microspheres with exposed {101} facets.
部门归属	[zhang, haimin; liu, porun; liu, hongwei; wang, yun; zhang, shanqing; guo, mingxing; zhao, huijun] griffith univ, ctr clean environm & energy, griffith, qld 4222, australia. [zhang, haimin; liu, porun; liu, hongwei; wang, yun; zhang, shanqing; guo, mingxing; zhao, huijun] griffith univ, griffith sch environm, griffith, qld 4222, australia. [li, feng; cheng, huiming] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;zhao, hj (reprint author), griffith univ, ctr clean environm & energy, gold coast campus, griffith, qld 4222, australia;h.zhao@griffith.edu.au
关键词	Aggregation Anatase Facet Transformation Nanostructures Photocatalysis Titanium Oxide Sensitized Solar-cells Photocatalytic Activity Film Electrodes High Percentage Visible-light Titania Nanosheets Spheres Nanocrystals Templates
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30877
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. M. Zhang,P. R. Liu,F. Li,et al. Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}[J]. Chemistry-a European Journal,2011,17(21):5949-5957.
APA	H. M. Zhang.,P. R. Liu.,F. Li.,H. W. Liu.,Y. Wang.,...&H. J. Zhao.(2011).Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}.Chemistry-a European Journal,17(21),5949-5957.
MLA	H. M. Zhang,et al."Facile Fabrication of Anatase TiO(2) Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}".Chemistry-a European Journal 17.21(2011):5949-5957.